Help!! What am I doing wrong?

I new to quilting as some of you know. I brought one of those monthly Quilt Block Kit. And this is the problem. I cut each piece like I should I measured and remeasured. 2"x2" each finish row should be 2"x 6 1/2". And when finish the whole thing should be 6 1/2 x 6 1/2 Well mine is 6 x 6 I measured my seams to make sure they are 1/4 and they are. I just don't know where I went wrong. Any suggests? Nothing ever comes out the size it should with me.
Nell

2" squares sewn together = 1 1/2"...so, 4 of them should measure 6"
it sounds as if you needed to add a seam allowance...1/2" seam allowances need to be added to pieces that will be sewn into blocks. it sounds as if the 2" is the finished size

Test your seam allowance. Cut a 2.5" strip of fabric, cut that into 3 pieces, and sew those 3 pieces together. Press the seams to one side, then measure the width. If you don't get a width of 6.5", then the problem is with your seam allowance and/or your pressing. The seam allowance needs to be *scant* because when you iron the seam some of the fabric is used up by the "turn of the cloth". This is how cutting exactly and sewing an exact 1/4" seam allowance can cause your blocks to come out smaller than you expect.